22311201201221 has 8 divisors (see below), whose sum is σ = 22339782034200. Its totient is φ = 22282622844160.

The previous prime is 22311201201209. The next prime is 22311201201271. The reversal of 22311201201221 is 12210210211322.

It can be written as a sum of positive squares in 4 ways, for example, as 5838650668900 + 16472550532321 = 2416330^2 + 4058639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22311201201221 - 2¹⁸ = 22311200939077 is a prime.

It is a super-3 number, since 3×22311201201221³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22311201201193 and 22311201201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22311201201271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17764361 + ... + 18978801.

It is an arithmetic number, because the mean of its divisors is an integer number (2792472754275).

Almost surely, 2^{22311201201221} is an apocalyptic number.

It is an amenable number.

22311201201221 is a deficient number, since it is larger than the sum of its proper divisors (28580832979).

22311201201221 is a wasteful number, since it uses less digits than its factorization.

22311201201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237959.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 22311201201221 its reverse (12210210211322), we get a palindrome (34521411412543).

The spelling of 22311201201221 in words is "twenty-two trillion, three hundred eleven billion, two hundred one million, two hundred one thousand, two hundred twenty-one".